Since 1993 Tennessee has used high occupancy vehicle (HOV) lanes as a tool to promote ridesharing to reduce congestion on urban interstates. The central concept for HOV lanes is to move more people rather than more cars. Each vehicle that travels in an HOV lane must carry the minimum number of people posted on the entrance signs. In Tennessee that means at least two people. Exceptions: Motorcycles and Hybrid vehicles with the Smart Pass sticker.

Public awareness and enforcement are key in maintaining the effectiveness of HOV lanes. We will be restriping the lanes with wider, broken lines so the HOV lanes are more visually obvious to motorists. This provides a mental barrier for a single occupant when deciding to drive into or stay out of the HOV lanes. Tennessee law provides a fine not to exceed $50, plus court costs for violation of HOV lane requirements.

Beginning in 2009, the Smart Pass program allows eligible low emission and energy efficient vehicle owners to obtain a special decal, at no cost, which allows them access to the HOV lanes without adhering to the occupancy requirement. Qualified applicants are advised to place the decal on the outside of their vehicle's rear window in the lower right (passenger side) corner.